Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Well I went ahead and bought replacement hall effect sensors, as I noticed that the ignition circuit would fire when black was connected to the blue wires (replicating hall effect pulling down when activated) So far what I am noticing is that it works with the replacement sensor, but 2 wires fire at a time.  I suspect it always did that and I just didn't know/observe it. So I just need to get the new sensor all soldered in and make sure it can't short out. I don't know what caused the failure, if it might have been a stray water drop or jolt from the ignition that fried the hall effect sensor. Not sure, but for 8$ I have 9 more replacements.